| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet-like pack material capable of extending generation time of carbon dioxide.SOLUTION: This sheet-like pack material is obtained by integrally laminating a nonwoven fabric permeable water and air A1, a layer 2 composed of sodium hydrogen carbonate and carboxymethyl cellulose, a non woven fabric 3 having coarse mesh, a layer 4 composed of citric acid or sodium dihydrogen citrate, and a nonwoven fabric permeable water and air B5, in this order. 5 pts.mass or more of carboxymethyl cellulose is used with respect to 100 pts.mass of the total mass of sodium hydrogen carbonate and citric acid or sodium dihydrogen citrate. The non woven fabric 3 having coarse mesh is obtained by accumulating core-sheath type conjugate short fibers in which the sheath component is composed of low melting point polyester and the core component is composed of high melting point polyester, and softening or melting the sheath component so that the mutual short fibers are fused. Any of sodium hydrogen carbonate, citric acid, sodium dihydrogen citrate and carboxymethyl cellulose is powder. |
